patches.baytrail/0234-drm-i915-fix-up-the-edp-power-well-check.patch

From 5a53a12165befa51a0a7c6def19ce1f856b1c73a Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri, 31 May 2013 17:49:17 +0200
Subject: drm/i915: fix up the edp power well check

Now that we track the cpu transcoder we need accurately in the pipe
config we can finally fix up the transcoder check. With the current
code eDP on port D will be broken since we'd errornously cut the
power.

For reference see

commit 2124b72e6283c4e84a55e71077fee91793f4c801
Author: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date:   Fri Mar 22 14:07:23 2013 -0300

    drm/i915: don't disable the power well yet

v2:
- Kill the now outdated comment (Paulo)
- Add the missing crtc->base.enabled check and consolidate it (Paulo)
- Smash all checks together, looks neater that way.

v3: Kill the unused encoder variable.

Cc: Takashi Iwai <tiwai@suse.de>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit e7a639c445e1f7c44adc1665539fa8e3af0b8e30)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 959ebc7a8283..b16c95720f7b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5793,23 +5793,13 @@ static void haswell_modeset_global_resources(struct drm_device *dev)
 {
 	bool enable = false;
 	struct intel_crtc *crtc;
-	struct intel_encoder *encoder;
 
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
-		if (crtc->pipe != PIPE_A && crtc->base.enabled)
-			enable = true;
-		/* XXX: Should check for edp transcoder here, but thanks to init
-		 * sequence that's not yet available. Just in case desktop eDP
-		 * on PORT D is possible on haswell, too. */
-		/* Even the eDP panel fitter is outside the always-on well. */
-		if (crtc->config.pch_pfit.size && crtc->base.enabled)
-			enable = true;
-	}
+		if (!crtc->base.enabled)
+			continue;
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list,
-			    base.head) {
-		if (encoder->type != INTEL_OUTPUT_EDP &&
-		    encoder->connectors_active)
+		if (crtc->pipe != PIPE_A || crtc->config.pch_pfit.size ||
+		    crtc->config.cpu_transcoder != TRANSCODER_EDP)
 			enable = true;
 	}
 
-- 
1.8.5.rc3